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The Skywatcher Quattro 250P is an Affordable, Large Aperture Astrograph, Ideal for Users Searching for a Fast Imaging System that will Work for Both Astrophotography and Visual Astronomy.
Boasting a Swift f/4 Focal Ratio, this Astrograph can Produce an Exposure 6x Faster than the Average 8Inch f/10 Schmidt Cassegrain Telescope.
Although Designed as an Imaging Optical Tube, these Newtonians also Produce Bright and Detailed Viewing for Visual Astronomy.
Like all SkyWatcher Reflectors, the Quattro Imaging Newtonian Features Borosilicate Mirrors Coated with SkyWatcher's Proprietary Radiant Aluminum Quartz (RAQ), Producing 94% Reflectivity.
The Tube is Constructed with Rolled Steel, then Coated with SkyWatcher's Signature Glossy MetalFlake Black Diamond Finish.
The OTA uses an Oversized Secondary Mirror Providing Greater Illumination for DSLRs and CCDs Using FullFrame Sensors, and an Optional Coma Corrector is Available for Those who Want to Take their Imaging to the Next Level.
Included with the Quattro Imaging Newtonian is a 10:1 DualSpeed 2Inch CrayfordStyle Focuser, 1.25 and 2Inch Eyepiece Adapters, a 9×50 Finderscope, Tube Rings, and a VStyle Dovetail Plate.
Optical Design: Newtonian
Mirror Coatings: Radiant Aluminum Quartz (RAQ) Coatings with 94% Reflectivity
Glass Type: Borosilicate
True Aperture: 257mm
Primary Aperture: 254mm
F/Ratio: 4
Focal Length: 1000mm
Secondary Diameter: 89mm
Secondary Obstruction (by Diameter): 35%
Secondary Obstruction by Area: 12%
Dawes Limit: 0.46
Rayleigh Limit: 0.55
Limiting Mag.: 14.5
Minimum Magnification: 36X
Maximum Magnification: 500X
Light Gathering (Compared to Next Size Down): 57%
Focuser: 2Inch Dual Speed Crayford
OTA Length (Retract/Ext.): 36.5"
OTA Outer Diameter: 11.375"
OTA Weight (with Accessories): 16.56kg
